2131526 Genuine Paccar DOC Inlet Catalyst Module

The 2131526 DOC inlet catalyst module is manufactured to Paccar factory specifications for oxidizing exhaust pollutants ahead of the DPF and SCR stages.

• Positioned at the inlet of the aftertreatment assembly, the DOC is the first emissions-control component contacted by the engine exhaust.
• Carbon monoxide passing through the catalyst undergoes an oxidation reaction that converts it into carbon dioxide.
• Unburned hydrocarbons react inside the catalyst and are converted into water and carbon dioxide.
• Soluble organic material carried with the soot is burned off as the exhaust moves through the DOC.
• Heat generated by the oxidation reaction raises the exhaust temperature before it enters the downstream DPF.
• Higher exhaust temperature helps ignite and burn accumulated soot during the diesel particulate filter regeneration process.
• Treated exhaust leaves the inlet catalyst and continues toward the DPF or SCR section of the aftertreatment system.